Daniell's hygrometer, a form of hygrometer consisting of a bent glass tube terminating in two bulbs, the one covered with muslin, the other of black glass, and containing ether and a thermometer. Ether being poured on the muslin, the black ball, cooled by the evaporation of the ether within, is soon covered with dew; at this moment, the inclosed thermometer gives the dew-point, and this, compared with the reading of one in the air, determines the humidity.

(Hy`gro*met"ric Hy`gro*met"ric*al) a. [Cf. F. hygrométrique.]

1. Of or pertaining to hygrometry; made with, or according to, the hygrometer; as, hygrometric observations.

2. Readily absorbing and retaining moisture; as, hygrometric substances, like potash.

(Hy*grom"e*try) n. [Cf. F. hygrométrie.] (Physics) That branch of physics which relates to the determination of the humidity of bodies, particularly of the atmosphere, with the theory and use of the instruments constructed for this purpose.

(Hy*groph"a*nous) a. [Gr. wet + to show.] Having such a structure as to be diaphanous when moist, and opaque when dry.

(Hy`groph*thal"mic) a. [Gr. wet + E. ophthalmic.] (Anat.) Serving to moisten the eye; — sometimes applied to the lachrymal ducts.

(Hy"gro*plasm) n. [Gr. wet + form, mold.] (Biol.) The fluid portion of the cell protoplasm, in opposition to stereoplasm, the solid or insoluble portion. The latter is supposed to be partly nutritive and partly composed of idioplasm.

(Hy"gro*scope) n. [Gr. wet + -scope: cf. F. hygroscope.] (Physics) An instrument which shows whether there is more or less moisture in the atmosphere, without indicating its amount.

(Hy`gro*scop"ic) a. [Cf. F. hygroscopique.]

(Hy`gi*en"ics), n. The science of health; hygiene.

(Hy"gi*en*ism) n. Hygiene.

(Hy"gi*en*ist), n. One versed in hygiene.

(Hy`gi*ol"o*gy) n. [Gr. health + -logy.] A treatise on, or the science of, the preservation of health. [R.]

(Hy"grine) n. [From Gr. moist.] (Chem.) An alkaloid associated with cocaine in coca leaves and extracted as a thick, yellow oil, having a pungent taste and odor.

(Hy"gro*deik) n. [Gr. wet, moist, and to show.] (Physics) A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing directly the percentage of moisture in the air, etc.

(Hy"gro*graph) n. [Gr. wet + -graph.] (Physics) An instrument for recording automatically the variations of the humidity of the atmosphere.

(Hy*grol"o*gy) n. [Gr. wet + -logy: cf. F. hygrologie.] (Med.) The science which treats of the fluids of the body.

(Hy*grom"e*ter) n. [Gr. wet, moist + -meter: cf. F. hygromètre.] (Physics) An instrument for measuring the degree of moisture of the atmosphere.

  By PanEris using Melati.

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